Overload protection circuit, control method and device, vehicle and electronic equipment

Abstract

The invention provides an overload protection circuit, a control method and device, a vehicle and electronic equipment. The overload protection circuit comprises a switch element, a current monitoring circuit and a diagnosis control circuit, the switch element is arranged on a load circuit, is connected with the diagnosis control circuit, and is used for switching on and off states according to a control instruction of the diagnosis control circuit; the current monitoring circuit is connected with the load circuit and is used for monitoring the current state of the load circuit; and the diagnosis control circuit is respectively connected with the current monitoring circuit and the switching element, and is used for controlling the switching element to be switched on and off according to a voltage signal of a load circuit. Compared with the prior art, the overload protection circuit provided by the invention can obtain the current information of the load circuit in real time, and the diagnosis control circuit judges whether to control the on-off of the load circuit according to the current information; according to the overload protection circuit provided by the invention, the on-off of the load circuit can be controlled with low power consumption in a constant power state.

Description

Technical Field

[0001] The present disclosure relates to the technical field, and in particular to an overload protection circuit and control method, device, vehicle, and electronic equipment. Background Art

[0002] Traditional fuel vehicle body power distribution systems mostly use fusible fuse solutions; once a fusible fuse blows due to overcurrent, it needs to be replaced manually, which has disadvantages such as cumbersome replacement process and poor flexibility. However, the body power distribution system in new energy vehicles has many high-power electrical appliances, and the use of fusible fuses cannot achieve intelligent power distribution for various electrical appliances. For ordinary loads with intelligent power distribution requirements, the industry currently usually uses high-side driver chips to achieve low-cost intelligent power supply, but the disadvantage is that high-side driver chips usually have high power consumption and require MCU control, making it difficult to achieve low-power normal power output. Summary of the invention

[0003] The present invention provides an overload protection circuit and control method, device, vehicle, and electronic equipment, the main purpose of which is to achieve constant power output in a low power consumption state.

[0004] According to a first aspect of the present disclosure, there is provided an overload protection circuit, which includes: a switch element, a current monitoring circuit and a diagnosis control circuit;

[0005] The switch element is arranged on the load circuit, electrically connected to the diagnosis control circuit, and is used to switch the open and closed states according to the control instructions of the diagnosis control circuit;

[0006] The current monitoring circuit is electrically connected to the load circuit and is used to monitor the current state of the load circuit;

[0007] The diagnosis control circuit is electrically connected to the current monitoring circuit and the switch element respectively, and is used to control the opening and closing of the switch element according to the voltage signal of the load circuit.

[0008] Optionally, the switching element is a depletion-type field effect transistor.

[0009] Optionally, the diagnostic control circuit includes: a comparator, a preset resistor, an OR gate and a buffer;

[0010] The comparator is electrically connected to the current monitoring circuit and is used to compare the voltage signal of the load circuit with a preset threshold value;

[0011] The preset resistor is electrically connected to the comparator and is used to adjust the hysteresis curve of the comparator;

[0012] The OR gate is electrically connected to the comparator, the buffer and the main controller respectively, and is used to generate a corresponding driving signal in response to a comparison result of the comparator and / or a control signal of the main controller;

[0013] The buffer is electrically connected to the switch element and the OR gate respectively, and is used for smoothing the drive signal.

[0014] Optionally, the overload protection circuit further includes: a latch circuit;

[0015] The latch circuit is electrically connected to the comparator and is used to record an overcurrent fault of the load circuit.

[0016] According to a second aspect of the present disclosure, a control method for an overload protection circuit is provided, comprising:

[0017] Acquire the voltage signal in the load circuit;

[0018] Acquire the voltage signal in the load circuit;

[0019] If the voltage signal does not exceed the preset threshold, it is determined that the load circuit is not overloaded;

[0020] If the voltage signal exceeds a preset threshold, it is determined that the load circuit is overloaded, and a driving voltage is generated;

[0021] Based on the drive voltage, the switching element in the load circuit is controlled to open and close.

[0022] Optionally, the method further includes:

[0023] In response to a control instruction from a main controller, the drive voltage is generated to control the opening and closing of a switch element in the load circuit.

[0024] According to a third aspect of the present disclosure, there is provided a control device for an overload protection circuit, comprising:

[0025] An acquisition unit, used for acquiring a voltage signal in a load circuit;

[0026] A first determination unit, configured to determine that the load circuit is not overloaded if the voltage signal does not exceed a preset threshold;

[0027] a second determination unit, configured to determine that a current overload occurs in the load circuit and generate a driving voltage if the voltage signal exceeds a preset threshold;

[0028] The first control unit is used to control the opening and closing of the switch element in the load circuit based on the driving voltage.

[0029] Optionally, the device further comprises:

[0030] The second control unit is used to generate the driving voltage to control the opening and closing of the switch element in the load circuit in response to the control instruction of the main controller.

[0031] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising: the circuit described in the first aspect and / or the device described in the third aspect.

[0032] According to a fifth aspect of the present disclosure, there is provided an electronic device, including:

[0033] at least one processor; and

[0034] a memory communicatively connected to the at least one processor; wherein,

[0035] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method described in the second aspect.

[0036] According to a sixth aspect of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method described in the second aspect above.

[0037] According to a seventh aspect of the present disclosure, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the method as described in the second aspect above.

[0038] The present disclosure provides an overload protection circuit and control method, device, vehicle, and electronic device, including: a switch element, a current monitoring circuit, and a diagnostic control circuit; the switch element is arranged on the load circuit, connected to the diagnostic control circuit, and is used to switch the open and close state according to the control instruction of the diagnostic control circuit; the current monitoring circuit is connected to the load circuit, and is used to monitor the current state of the load circuit; the diagnostic control circuit is respectively connected to the current monitoring circuit and the switch element, and is used to control the opening and closing of the switch element according to the voltage signal of the load circuit. Compared with the related art, the overload protection circuit provided by the present disclosure can obtain the current information of the load circuit in real time, and the diagnostic control circuit determines whether to control the on and off of the load circuit according to the current information; the overload protection circuit provided by the present disclosure can realize low-power consumption control of the on and off of the load circuit under normal power state.

[0039] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.

[0041] Figure 1 A schematic diagram of an overload protection circuit provided by an embodiment of the present disclosure;

[0042] Figure 2 A schematic diagram of another overload protection circuit provided by an embodiment of the present disclosure;

[0043] Figure 3 A flow chart of a control method of an overload protection circuit provided in an embodiment of the present disclosure;

[0044] Figure 4 A schematic diagram of the structure of a control device for an overload protection circuit provided in an embodiment of the present disclosure;

[0045] Figure 5 A schematic block diagram of an exemplary electronic device provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0046] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0047] The overload protection circuit and control method, device, vehicle, and electronic device of the embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0048] Figure 1 A schematic diagram of an overload protection circuit provided in an embodiment of the present disclosure.

[0049] like Figure 1 As shown, the overload protection circuit in the embodiment of the present disclosure includes: a switch element, a current monitoring circuit and a diagnosis control circuit;

[0050] The switch element is arranged on the load circuit, electrically connected to the diagnosis control circuit, and is used to switch the open and closed states according to the control instructions of the diagnosis control circuit;

[0051] The current monitoring circuit is electrically connected to the load circuit and is used to monitor the current state of the load circuit;

[0052] The diagnosis control circuit is electrically connected to the current monitoring circuit and the switch element respectively, and is used to control the opening and closing of the switch element according to the voltage signal of the load circuit.

[0053] In the embodiments of the present disclosure, please refer to Figure 1 , the current changes in the load circuit are monitored by the current monitoring circuit. The diagnostic control circuit determines whether a current overload occurs in the load circuit based on the monitoring result of the current monitoring circuit. When it is determined that a current overload occurs in the load circuit, the diagnostic control circuit controls the switch element to disconnect the load circuit. It can be understood that the method for monitoring the current in the load circuit can be a monitoring method based on a Hall current detection element, or it can be a monitoring method based on a combination of a current detection resistor and an operational amplifier; the embodiments of the present disclosure do not limit the way in which the current monitoring circuit monitors the current.

[0054] It is understood by those skilled in the art that the method of using a high-side driver chip instead of an electronic fuse usually requires the control of a microcontroller unit (MCU) to realize the opening and closing of the load circuit; and it is not possible to achieve low power output under normal power conditions. In order to reduce power consumption under normal power conditions, a fault diagnosis circuit is needed that can automatically diagnose faults based on the monitoring results of a current monitoring circuit and control the opening and closing of the load circuit. The power consumption caused by a complex fault diagnosis circuit is reduced, thereby avoiding damage to the battery in the vehicle due to excessive discharge.

[0055] The present disclosure provides an overload protection circuit, such as Figure 1 As shown, it includes: a switch element, a current monitoring circuit and a diagnostic control circuit; the switch element is arranged on the load circuit, connected to the diagnostic control circuit, and is used to switch the open and close state according to the control instruction of the diagnostic control circuit; the current monitoring circuit is connected to the load circuit, and is used to monitor the current state of the load circuit; the diagnostic control circuit is respectively connected to the current monitoring circuit and the switch element, and is used to control the opening and closing of the switch element according to the voltage signal of the load circuit. Compared with the related art, the overload protection circuit provided by the present disclosure can obtain the current information of the load circuit in real time, and the diagnostic control circuit determines whether to control the on and off of the load circuit according to the current information; the overload protection circuit provided by the present disclosure can realize low-power consumption control of the on and off of the load circuit under normal power state.

[0056] Furthermore, in a possible implementation of this embodiment, the switch element is a depletion-type field effect transistor.

[0057] Field effect transistors (metal-oxide-semiconductor field-effect transistor, MOSFET) are mainly divided into depletion type and enhancement type. The main difference between depletion type and enhancement type is that depletion type MOSFET has a conductive channel when no voltage is applied to the G terminal (Gate), while enhancement type MOSFET will only have a conductive channel after it is turned on; the control methods of the two are also different. The VGS (gate voltage) of the depletion type MOSFET can be controlled to be turned on with positive, zero, and negative voltages, while the enhancement type MOSFET must make VGS>VGS(th) (gate threshold voltage). Compared with the depletion type MOSFET, the enhancement type MOSFET requires a more complex control circuit to drive the switch. Therefore, the depletion type MOSFET is more suitable for achieving low-power output under normal power conditions.

[0058] Specifically, in the embodiment of the present disclosure, a depletion type P-MOSFET is used as an example for description. Figure 1 , the carrier channel exists by default in P-MOSFET, that is, when VGS=0, the SD ends of the switch element (depletion-type P-MOSFET) are in a low impedance state, and the current can flow from the S end to the D end. When VGS> the driving threshold, the carrier channel in the switch element is pinched off, and the SD ends of the switch element are in a high impedance state, and the current cannot flow. The driving voltage generated by the diagnostic control circuit is the gate voltage applied to the depletion-type P-MOSFET.

[0059] Furthermore, in a possible implementation of this embodiment, as Figure 2 As shown, the diagnostic control circuit includes: a comparator, a preset resistor, an OR gate and a buffer;

[0060] The comparator is electrically connected to the current monitoring circuit and is used to compare the voltage signal of the load circuit with a preset threshold value;

[0061] The preset resistor is electrically connected to the comparator and is used to adjust the hysteresis curve of the comparator;

[0062] The OR gate is electrically connected to the comparator, the buffer and the main controller respectively, and is used to generate a corresponding driving signal in response to a comparison result of the comparator and / or a control signal of the main controller;

[0063] The buffer is electrically connected to the switch element and the OR gate respectively, and is used for smoothing the drive signal.

[0064] Specifically in the embodiments of the present disclosure, please refer to Figure 2, the comparator is connected to the current monitoring circuit, and the current monitoring circuit converts the current information in the load circuit into an output voltage signal. The comparator is used to compare the output voltage signal of the current monitoring circuit with a preset threshold value (overcurrent threshold voltage) Vth1. Exemplarily, when the detected voltage signal value exceeds Vth1, the comparator outputs a logic low level, otherwise it outputs a logic high level. Based on the output logic level, a drive signal is further generated to control the switching element. The preset resistor is connected to the comparator, and the hysteresis curve of the comparator can be adjusted by adjusting the resistance value of the preset resistor (R1 and R2), thereby achieving a certain degree of filtering effect. The preset resistor is a variable resistor, and the present disclosure does not limit what type of variable resistor the preset resistor is. The preset threshold value can be set according to the electrical load in the load circuit, and the present disclosure does not limit this.

[0065] The OR gate performs a "logical OR" operation on the comparator output and the MCU control signal, that is, when either "overcurrent fault occurs" or "MCU actively shuts down the output" is valid, the output will be turned off.

[0066] The buffer is used to smooth the drive signal and provide a certain delay. The typical circuit form of the buffer can be composed of mature circuits such as RC circuits and all-pass filter circuits, which are not limited in the embodiments of the present disclosure. The buffer can adjust the overcurrent response time (i.e., how long it takes to perform the shutdown action after reaching the overcurrent threshold) and the re-conduction time. The buffer output logic high or low level can directly drive the depletion type P-MOSFET, thereby controlling the opening and closing of the circuit.

[0067] In summary, the diagnostic control circuit determines whether the load circuit is overloaded by comparing the monitoring result of the current monitoring circuit with the preset threshold value. When it is determined that the load circuit is overloaded by current, a driving voltage is generated to control the switch element to disconnect. The preset threshold value in the diagnostic circuit can be flexibly adjusted according to the specific situation of the load circuit, so that the overload protection circuit provided by the present disclosure can adapt to different load circuits and has wider adaptability.

[0068] Further, in a possible implementation of this embodiment, the overload protection circuit further includes: a latch circuit;

[0069] The latch circuit is electrically connected to the comparator and is used to record an overcurrent fault of the load circuit.

[0070] Specifically, in the disclosed embodiment, the latch is used to record the overcurrent fault event in the load circuit, and the MCU can determine whether an overcurrent fault has occurred by reading the output of the circuit. Figure 2, the latch circuit is implemented by a latch circuit; the latch circuit can also be implemented by a trigger circuit, a transistor self-locking circuit and other circuit structures, and the embodiments of the present disclosure do not limit the latch circuit.

[0071] Corresponding to the above-mentioned overload protection circuit, the present disclosure also proposes a control method for the overload protection circuit. Since the method embodiment of the present disclosure corresponds to the above-mentioned circuit embodiment, the details not disclosed in the method embodiment can be referred to the above-mentioned circuit embodiment, and will not be described one by one in the present disclosure.

[0072] Figure 3 A flow chart of a control method for an overload protection circuit provided in an embodiment of the present disclosure.

[0073] like Figure 3 As shown, the method comprises the following steps:

[0074] Step 101, obtaining a voltage signal in a load circuit.

[0075] Overload current in the load circuit will cause the load in the circuit to malfunction. Adding a fuse in the load circuit can protect the load from damage. If the method of using a blown fuse is not used, when using an electronic fuse or other methods, it is necessary to monitor the current in the load circuit.

[0076] In the embodiments of the present disclosure, the current monitoring circuit converts the current information in the load circuit into a voltage signal. Directly obtaining the current signal in the load circuit has certain difficulties and may cause the current monitoring circuit to become complicated. The change of the current in the load circuit can be indirectly reflected by obtaining the voltage signal across the detection resistor in the load circuit.

[0077] Step 102: If the voltage signal does not exceed the preset threshold, it is determined that the load circuit is not overloaded.

[0078] In the embodiments of the present disclosure, it is determined whether the load circuit is overloaded according to the voltage signal in the load circuit. For example, the voltage signal can be compared with a preset threshold value to make a determination, or a preset diagnostic program can be used to determine whether the load circuit is overloaded. It should be noted that the embodiments of the present disclosure do not limit how to determine whether the load circuit is overloaded.

[0079] Step 103: If the voltage signal exceeds a preset threshold, it is determined that the load circuit is overloaded, and a driving voltage is generated.

[0080] In the embodiment of the present disclosure, by comparing the voltage signal with the preset threshold value, it is determined whether the current overload occurs in the load circuit. The current monitoring circuit converts the current information in the load circuit into an output voltage signal. When the detected voltage signal value exceeds the preset threshold value Vth1, a driving voltage is generated to control the switch element.

[0081] Step 104: Controlling the opening and closing of a switch element in the load circuit based on the driving voltage.

[0082] In an embodiment of the present disclosure, when it is determined that a current overload occurs in the load circuit, a driving voltage is generated based on a diagnostic control circuit to drive a switch element in the load circuit to disconnect. The switch element is a depletion-type MOSFET, and the on and off of the load circuit is controlled by changing the gate voltage of the switch element.

[0083] In summary, by acquiring the voltage signal in the load circuit in real time, it is determined whether the load circuit is overloaded. When it is determined that the current is overloaded, the depletion-type MOSFET in the load circuit is controlled to be turned on and off to protect the load circuit.

[0084] Furthermore, in a possible implementation of this embodiment, the method further includes:

[0085] In response to a control instruction from a main controller, the drive voltage is generated to control the opening and closing of a switch element in the load circuit.

[0086] Specifically, in the embodiment of the present disclosure, the main controller may be an MCU in the current load circuit or a main control unit in the vehicle, which is not limited in the present disclosure. After receiving the control instruction sent by the main controller, the load circuit is controlled to be opened or closed. For example, in application scenarios where the load circuit needs to be opened, such as replacing a device in the load circuit.

[0087] It should be noted that the embodiments of the present disclosure may include multiple steps. For the convenience of description, these steps are numbered, but these numbers do not limit the execution time slots or execution order between the steps; these steps can be implemented in any order, and the embodiments of the present disclosure do not limit this.

[0088] Corresponding to the above-mentioned control method of the overload protection circuit, the present disclosure also proposes a control device for the overload protection circuit. Since the device embodiment of the present disclosure corresponds to the above-mentioned method embodiment, the details not disclosed in the device embodiment can be referred to the above-mentioned method embodiment, and will not be repeated in the present disclosure.

[0089] Figure 4 A schematic diagram of a control device for an overload protection circuit provided in an embodiment of the present disclosure is shown in FIG. Figure 4As shown, including:

[0090] An acquisition unit 21, used to acquire a voltage signal in a load circuit;

[0091] A first determination unit 22, configured to determine that the load circuit is not overloaded if the voltage signal does not exceed a preset threshold;

[0092] A second determination unit 23, configured to determine that a current overload occurs in the load circuit and generate a driving voltage if the voltage signal exceeds a preset threshold;

[0093] The first control unit 24 is used to control the opening and closing of the switch element in the load circuit based on the driving voltage.

[0094] Furthermore, in a possible implementation of this embodiment, as Figure 4 As shown, the device also includes:

[0095] The second control unit 25 is used to generate the driving voltage to control the opening and closing of the switch element in the load circuit in response to the control instruction of the main controller.

[0096] It should be noted that the above explanation of the method embodiment is also applicable to the device of this embodiment, and the principle is the same, which is not limited in this embodiment.

[0097] Furthermore, an embodiment of the present disclosure also provides a vehicle, which includes the control device and / or overload protection circuit of the overload protection circuit described in any of the above embodiments.

[0098] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.

[0099] Figure 5 A schematic block diagram of an example electronic device 300 that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0100] like Figure 5As shown, the device 300 includes a computing unit 301, which can perform various appropriate actions and processes according to a computer program stored in a ROM (Read-Only Memory) 302 or a computer program loaded from a storage unit 308 to a RAM (Random Access Memory) 303. In the RAM 303, various programs and data required for the operation of the device 300 can also be stored. The computing unit 301, the ROM 302, and the RAM 303 are connected to each other via a bus 304. An I / O (Input / Output) interface 305 is also connected to the bus 304.

[0101] A number of components in the device 300 are connected to the I / O interface 305, including: an input unit 306, such as a keyboard, a mouse, etc.; an output unit 307, such as various types of displays, speakers, etc.; a storage unit 308, such as a disk, an optical disk, etc.; and a communication unit 309, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 309 allows the device 300 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0102] The computing unit 301 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 301 include, but are not limited to, a CPU (Central Processing Unit), a GPU (Graphic Processing Units), various dedicated AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, a DSP (Digital Signal Processor), and any appropriate processor, controller, microcontroller, etc. The computing unit 301 performs the various methods and processes described above, such as a control method for an overload protection circuit. For example, in some embodiments, the control method for an overload protection circuit may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 308. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 300 via the ROM 302 and / or the communication unit 309. When the computer program is loaded into the RAM 303 and executed by the computing unit 301, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the computing unit 301 may be configured to execute the aforementioned control method of the overload protection circuit in any other appropriate manner (for example, by means of firmware).

[0103] Various embodiments of the systems and techniques described above herein may be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application Specific Standard Products), SOCs (System On Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that may be executed and / or interpreted on a programmable system including at least one programmable processor that may be a dedicated or general-purpose programmable processor that may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0104] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0105] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include electrical connections based on one or more lines, portable computer disks, hard disks, RAM, ROM, EPROM (Electrically Programmable Read-Only-Memory) or flash memory, optical fiber, CD-ROM (Compact Disc Read-Only Memory), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0106] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0107] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: LAN (Local Area Network), WAN (Wide Area Network), the Internet, and blockchain networks.

[0108] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services ("Virtual Private Server", or "VPS" for short). The server may also be a server of a distributed system, or a server combined with a blockchain.

[0109] It should be noted that artificial intelligence is a discipline that studies how computers can simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, planning, etc.), and includes both hardware-level and software-level technologies. Artificial intelligence hardware technologies generally include technologies such as sensors, dedicated artificial intelligence chips, cloud computing, distributed storage, and big data processing; artificial intelligence software technologies mainly include computer vision technology, speech recognition technology, natural language processing technology, as well as machine learning / deep learning, big data processing technology, knowledge graph technology, and other major directions.

[0110] The various numerical numbers such as first and second involved in the present disclosure are only for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure, but also indicate the order of precedence.

[0111] At least one in the present disclosure may also be described as one or more, and a plurality may be two, three, four or more, which is not limited in the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D".

[0112] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0113] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An overload protection circuit, characterized in that: include: Switching elements, current monitoring circuits and diagnostic control circuits; The switch element is arranged on the load circuit, electrically connected to the diagnosis control circuit, and is used to switch the open and closed states according to the control instructions of the diagnosis control circuit; The current monitoring circuit is electrically connected to the load circuit and is used to monitor the current state of the load circuit; The diagnosis control circuit is electrically connected to the current monitoring circuit and the switch element respectively, and is used to control the opening and closing of the switch element according to the voltage signal of the load circuit.

2. The overload protection circuit according to claim 1, characterized in that: The switch element is a depletion-type field effect transistor.

3. The overload protection circuit according to claim 1, characterized in that: The diagnostic control circuit includes: a comparator, a preset resistor, an OR gate and a buffer; The comparator is electrically connected to the current monitoring circuit and is used to compare the voltage signal of the load circuit with a preset threshold value; The preset resistor is electrically connected to the comparator and is used to adjust the hysteresis curve of the comparator; The OR gate is electrically connected to the comparator, the buffer and the main controller respectively, and is used to generate a corresponding driving signal in response to a comparison result of the comparator and / or a control signal of the main controller; The buffer is electrically connected to the switch element and the OR gate respectively, and is used for smoothing the drive signal.

4. The overload protection circuit according to claim 3, characterized in that: The overload protection circuit further includes: a latch circuit; The latch circuit is electrically connected to the comparator and is used to record an overcurrent fault of the load circuit.

5. A control method for an overload protection circuit, characterized in that: include: Acquire the voltage signal in the load circuit; If the voltage signal does not exceed the preset threshold, it is determined that the load circuit is not overloaded; If the voltage signal exceeds a preset threshold, it is determined that the load circuit is overloaded, and a driving voltage is generated; Based on the drive voltage, the switching element in the load circuit is controlled to open and close.

6. The method according to claim 5, characterized in that The method further comprises: In response to a control instruction from a main controller, the drive voltage is generated to control the opening and closing of a switch element in the load circuit.

7. A control device for an overload protection circuit, characterized in that: include: An acquisition unit, used for acquiring a voltage signal in a load circuit; A first determination unit, configured to determine that the load circuit is not overloaded if the voltage signal does not exceed a preset threshold; a second determination unit, configured to determine that a current overload occurs in the load circuit and generate a driving voltage if the voltage signal exceeds a preset threshold; The first control unit is used to control the opening and closing of the switch element in the load circuit based on the driving voltage.

8. A vehicle, characterized in that: The vehicle comprises the overload protection circuit according to claim 1 and / or the control device of the overload protection circuit according to claim 7.

9. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 5 to 6.

10. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 5-6.

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